My wife is trying out the NOD32 as I uninstalled her AVG for the time to try this. She has multi boot capability with a program called System Commander that allows a computer user to boot into one of several different installed Operating Systems. However, SC controls the booting and I am worried that if I have it scan the boot sector and it finds System Commander and it's boot setup it might change it. Would this be an setting to simply "bypass" in it's scanning of the computer? I run Avast! 4.7 Pro at the moment and this NOD 32 really looks like a great program. Only wish I had tried it out a bit sooner.